#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define USER "USER"
#define MYPWD "PWD"

int main()
{
    char *MY_PWD = getenv(MYPWD);
    printf("%s\n",MY_PWD);
    //char *who = getenv(USER);
    //if(strcmp(who,"root") == 0)
   // {
    //printf("%s\n",who);
    //printf("%s\n",who);
    //printf("%s\n",who);
    //printf("%s\n",who);
    //printf("%s\n",who);
    //printf("%s\n",who);
   // }
    //else{
       // printf("权限不足！\n");
    //}
    return 0;
}
